blitzer. wolf? >>ted, thanks very much. happening now. another top commander in a widening scandal swirling around general david petraeus. john allen is now the subject of a pentagon investigation. it centers around hundreds, possibly thousands of e-mails sent to this woman. details of where she fits into an increasingly tangled web of relationships. i'll talk about all of this with the chair of the senate intelligence committee. dianne feinstein says it is like something off the front page of a tab roid mloid magazine and s demanding answers. i'm wolf blitzer and you're in "the situation room." >>> we begin with stunning twists in the scandal that brought down the head of the cia, general david petraeus. another u.s. general is caught in the same tangled web. john allen, top commander in afghanistan, is being investigated by the pentagon for allegedly sending inappropriate e-mails to a married woman, the same woman whose complaint of threatening e-mails from general petraeus' lover cracked the scandal wide open. barbara starr is trying to sort this out for us. it is rather complic

voted for him.i'mwolfblitzer. you'rein "the situation room." >>> tempers flaring on capitol hill. senator john mccain lashing out at one of our cnn producers who questioned why he was missing a key hearing on the attack on the u.s. consulate in benghazi, libya. mccain has been a sharp critic of the president and his administration complaining lawmakers are not getting enough information. and when asked why he missed that meeting today, he lashed out. our senior congressional correspondent dana bash is up on capitol hill. she's got more on this sensitive story. dana, what happened? >> reporter: well, it turns out, wolf, cnn learned that most of the republicans on this key committee that had a briefing on what happened in benghazi did not go. in fact, it was three out of the eight republicans on that committee. one of those republicans who did not go to that briefing, it was a classified briefing, was john mccain. now, mccain at the time was having a press conference yesterday lashing out at the administration for not getting enough information and calling for a select committee to